Cycles SSS Rendered image has a strange "noise" coloring artifacts
This is caused by Blender trying very hard to render slight amounts of each shader. I.e. if you have a small amount of subsurfacing, and a whole lot of glass being shaded, it will be harder to render than an equal amount of both. Even trickier, if you have a large complex node setup with many different shaders mixed in. 

My advice to fix this problem, if you want to keep the subsurface low, would be to increase your samplings for rendering by a large amount. Increase the rendering samples by about 100 per render, until you find a good amount. If that doesn't work, then you will have to either lower the denoising strength, which is what actually causes those spots to appear, or increase the subsurface strength.